Chickenhead - are they only found in granite? Are they found in granite? I'd just simplify to: "A knobby feature resembling a chicken's head which provides excellent holds for hands or feet."

Clean - v. 1 v. -- remove the extra "v." at the start. Additional definition 3. adj. to complete a climb or problem without hang-dogging or falling, especially on top-rope.

new definition: Crash Pad - n. - Bouldering pad.

Crux - extra period "the most crucial.,"

Dihedral and Open Book should reference each other.

new definition: Express - n. A Quickdraw. Two caribiners connected by webbing or rope. Usually used to link the rope to an element of protection. (European)

Flag. Second sentence should be re-written to start "Also refers to using feet..."

Gym - n modify to "a usually indoor...". I have climbed at gyms with outdoor, but still artificial, climbing. (e.g. Kletterzentrum Stuttgart - http://www.kletterzentrum-stuttgart.de/ in Germany which has a large outdoor climbing structure or Planet Granite (Sunnyvale) - http://www.planetgranite.com/sc/home_sc.html which has outdoor bouldering.)

Hexcentric "reffered" should be "referred" -- double r, single f, not double f, single r.

Locking Carabiner -- should be a comma after "screw gate" too.

Natural Protection -- I disagree with this definition (you may wish to find concensus), but had always understand "natural" protection to be things like trees, roots, horns, etc where you just used a sling around it, rather than placing a piece.

Open Book - should see also dihedral.

Problem - n. A bouldering route.

Quickdraw - Two carabiners connected by webbing (usually) or rope. Use to link elements of protection or, more commonly, to link the rope to a piece of protection.

Sandbag - delete the extra "rating" in the sentence. "A climb that receives an inappropriately low rating for the difficulty."

Top Rope - last sentence, "In general this results in shorter falls than a lead." would probably be clearer.

Chickenhead - are they only found in granite? Are they found in granite? I'd just simplify to: "A knobby feature resembling a chicken's head which provides excellent holds for hands or feet."

Clean - v. 1 v. -- remove the extra "v." at the start. Additional definition 3. adj. to complete a climb or problem without hang-dogging or falling, especially on top-rope.

new definition: Crash Pad - n. - Bouldering pad.

Crux - extra period "the most crucial.,"

Dihedral and Open Book should reference each other.

new definition: Express - n. A Quickdraw. Two caribiners connected by webbing or rope. Usually used to link the rope to an element of protection. (European)

Flag. Second sentence should be re-written to start "Also refers to using feet..."

Gym - n modify to "a usually indoor...". I have climbed at gyms with outdoor, but still artificial, climbing. (e.g. Kletterzentrum Stuttgart - http://www.kletterzentrum-stuttgart.de/ in Germany which has a large outdoor climbing structure or Planet Granite (Sunnyvale) - http://www.planetgranite.com/sc/home_sc.html which has outdoor bouldering.)

Hexcentric "reffered" should be "referred" -- double r, single f, not double f, single r.

Locking Carabiner -- should be a comma after "screw gate" too.

Natural Protection -- I disagree with this definition (you may wish to find concensus), but had always understand "natural" protection to be things like trees, roots, horns, etc where you just used a sling around it, rather than placing a piece.

Open Book - should see also dihedral.

Problem - n. A bouldering route.

Quickdraw - Two carabiners connected by webbing (usually) or rope. Use to link elements of protection or, more commonly, to link the rope to a piece of protection.

Sandbag - delete the extra "rating" in the sentence. "A climb that receives an inappropriately low rating for the difficulty."

Top Rope - last sentence, "In general this results in shorter falls than a lead." would probably be clearer.

I noticed that "ring lock" is not in there. Something to the effect of "a jam for a crack that is wider than fingers and narrower than hands. Involved bridging the crack with the thumb, and stacking the fingers on top of the thumb."

Also, you may want to add to the definition of "Stack." In addition to a finger stack, you can stack hand and fist jams together with two hands for offwidth cracks.

I noticed that "ring lock" is not in there. Something to the effect of "a jam for a crack that is wider than fingers and narrower than hands. Involved bridging the crack with the thumb, and stacking the fingers on top of the thumb."

Also, you may want to add to the definition of "Stack." In addition to a finger stack, you can stack hand and fist jams together with two hands for offwidth cracks.

I noticed that "ring lock" is not in there. Something to the effect of "a jam for a crack that is wider than fingers and narrower than hands. Involved bridging the crack with the thumb, and stacking the fingers on top of the thumb."

Also, you may want to add to the definition of "Stack." In addition to a finger stack, you can stack hand and fist jams together with two hands for offwidth cracks.

Scum. v. to use a body part besides the hands or the feet to ascend or stay on the rock. Sometimes thought of as bad form, but can be used to negotiate a key rest on a long route. Ex. I would've fallen if I hadn't been able to scum with the top of my head on that roof and shake my arms out.

Knee bar. n. using the thigh and knee to hold oneself onto the rock, often to get a "no-hands rest." See Scum.

Cold shut: A type of fixed anchor composed of bent bar stock. Cold shuts, or "shuts," may be open (simply a bent hook that cradles the rope) or closed (welded into a complete loop of metal). Open shuts may be gated to keep the rope from popping out or not. While some types of shuts are still often installed atop (mostly) single-pitch climbs, they have fallen somewhat out favor. Reasons for this include a perceived strength weakness and their short lifespan relative to other types of anchors.

Stick Clip (n) A device attached to a pole of some sort, usually a painters pole, that will hold the carabiner on a quickdraw with rope attached. Used to clip the first and sometimes second bolt of a climb to prevent decking if you fall on the climb before you are able to clip the first bolt.